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Q3 (2 marks) The BOD5 of a wastewater is around 30mg/L. The wastewater will be mixed with enough water to fill in a 300-mL bottle

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Q3 (2 marks) The BOD5 of a wastewater is around 30mg/L. The wastewater will be mixed with enough water to fill in a 300-mL bottle with an initial DO of 9.0mg/L. It is required to have at least a 2.0mg/L drop in the DO during the five-day run, and the final DO should be at least 2.0mg/L. Please determine the range of the dilution fraction P

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